Today I did it, for the very first time: Did not build a package. Just ran "make install". Twice! ... ocamlfind install \ -ldconf ignore -destdir /usr/lib64/ocaml \ guestfs \ META *.so *.a *.cma *.cmi ./*.mli *.cmx *.cmxa ocamlfind: Package guestfs is already installed - (file /usr/lib64/ocaml/guestfs/META already exists) Makefile:2053: recipe for target 'install-data-hook' failed make[3]: *** [install-data-hook] Error 2 I wonder if that is failing just for my version of ocamlfind or if this is a common failure. How do you guys handle that situation?